package String;

public class StringBuilderDemo {
    public static void main(String[] args) {
       String str="好好休息吧Java";
       StringBuilder builder=new StringBuilder(str);

       builder.append(",为了找工作");
        System.out.println(builder);

        builder.replace(10,15,"只是为了摸鱼");
        System.out.println(builder);

        builder.delete(0,9);
        System.out.println(builder);

        builder.insert(0,"fish");
        System.out.println(builder);




        /*
        StringBuilder builder1=new StringBuilder();
        StringBuilder builder2=new StringBuilder("abc");

        String str="abc";
        StringBuilder builder3=new StringBuilder(str);
        String str2=builder3.toString();


         */
    }
}
